Pneumatic concrete steel car-bumper.



BATENTBDMAY 22, 1906.

A A T. MUGORMIGK. PNBUMATIG CONCRETE STEEL GAR BUMPER.

APPLICATION FILED DBO. l1, 1905.

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UNITED STATES PATENT l Oiibllbl.

THOMAS MOCORMICK, OF SOM ERVl LLE, MASSACHUSETTS.

PNEUMATIC CONCRETE STEEL CFlwBUlVlPEFl.

Specification of Letters Patent.

.Patented May 22, 1906.

Application led December 11, 1905. Serial No. 291,353.

To all whom it may concern:

Be it known that I, THOMAS MoCoaMiex, a citizen of the United States, residing at Somerville, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Pneumatic Concrete Steel Car-Bumpers, of which the followin is a specification. c i

his invention relates to means for stopping railway rolling-stock at the ends of railway tracks and sidings and particularly to a bumper` for this",purpose which shall be air` cushionedy and rigidly anchored.

ne object of this invention is to provide a car-bum er or end-rail obstruction of such design and) structure that a car or locomotive coming into contactwith it will be sto ped with the least possible concussion an damage to the car and the bumper, thus assuring an efficient obstruction.

Another object is to provide a reliable and lufrable bumper for the purpose just speci- The invention 'therefore consists in the structure hereinafter described and claimed and which is illustrated in the accompanying drawings, wherein- Figure 1 represents the improved bumper in plan, Fig. 2 a vertical longitudinal centra section thereof, and Fig. 3 an end elevaflor otherwise formed from iron or steel, and

within this cylinder is located a plunger 5, avinr a protruding portion of less diameter than the portion within the cylinder, thereby forming a shoulder, which rests against a ring or collar 6, removably secured to the outer end of the cylinder. For the sake of eompactness the plunger is hollow, as shown, and `is provided with a shoulder or ledge within this hollow or recess, between which and the rear end of the cylinder extends a spiral s ring 7, guided by the rod 9, which is prefera ly screwed into the rear end of the cylinder and extends into the plunger slightly beyond the ledge 8.

The mass of concrete for anchoring the buffer may be formed and secured in place in various Ways, but preferably` in the manner illustrated, wherein a couple of piles 10 are driveninto the ground and protrude suifi# ciently above the track-rails 11 to permit a piece of rail 12 to be bolted securely thereto while resting firmly on the track-rails- The forward end of the mass of concrete is formed over these two piles. as 13, are driven into the ground to the rear of. the firstl piles and protrude suiiieiently above the groundvto enter well into the rear end of the mass of concrete. These latter piles assist in preventing the rear end of the mass of concrete from being tipped into the ground, while the forward pair of piles assist in preventing the forward end ofthe mass of concrete from being lifted. The track-rails also are preferablyr upturned at their ends to assist in preventing longitudinal displacement of the mass of concrete, and to further insure against this longitudinal displacement and the tipping down of the rear end of the mass of concrete a piece of rail 14 may be laid across the traclvrails. Reinforcing-rods, as 15, extend longitudidl of the concrete mass near its upper surfw and other reinforcingrods, as. 16, extend over the rods 15 and downwardly to the track-rails, through perforations in which the ends thereof are assed.

and upwardly turned, as indicated in ig. 3. It is just beneath this network of reinforcingrods that the buffer is located, and to pro vide a more extended suiface to receive the thrust of the cylinder a number of pieces of rail are placed transversely of the mass of concrete against the end of the cylinder, as indicated at 17. As aprecaution against the withdrawal of the cylinder from the mass of concrete should it become at all loosened il its seat one or more ridges oi' projections may be formed upon the exterior of the cylinder or a collar or band, as indicated at 18, lmay be secured to the cylinder in any suitable manner.

To provide against a sudden rebound of the plunger and to give a more cushioned effect thereto when struck by a car, a vent from the cylinder is formed, as indicated at 19 in Fig. 3. This vent also provides for ingress of air to permit a ready return of the plunger in response to the pressure of the spring 7.

Obviously manv changes in. details and in the formation and combination of parts may be made without departing from the spirit of the invention. The invention claimed is- 1. A car-bumper consisting in the combi- A couple of other piles,

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' nation of a mass of artificial stone anchored IOv ,said mass.

` mounted in the mass of concrete.

at the end of a railway-track and a buffer anchored therein. t

2. A car-bumper consisting in the combination of e mass of concrete anchored at the end of a railway-track and a pneumatic buffer anchored therein.

3. A car-bumper consisting in the combination of a mass of concrete anchored on the rails of a railway and a buier mounted in 4. A car-bumper consisting in the combination o f a mass of concrete anchored to vthe ground by-piles and a b u'er mounted in said mass. v

5. The combination with the rails of a rail- Way-track, of amass of concrete formed upon sd rails, metal rods secured to said rails and embedded in the concrete and a buffer 8. The combination with lthe rails of a railf way-track, of amass of concrete formed upon said rails, .Substantially es Spee,

Q. The combination with'the' rais of a rail Wwf-track .0i e ree-.SS of 00m/ret@ fermd mp0s, i

said rails, and anchored to the ground by piles, substantially as specified. I

10. The combination with the rails of a railway-track, of a mass of concrete formed upon said rails, and anchored to the ground by piles, of a bufer supported by steel rods` embedded in the concrete, substantiallyv as specified. n 1l. The combination With the rails of .a railway-track, of a mass of concrete formed upon said rails,

end anchored t0 the ground by piles, of a buffer supported by steel rods embedded in the concrete and reinforced by turned rail ends Vand cross-pieces, substanf l 12. The, CQmblnatiQn with the rails of a i railway-tred?, of a mass Of concrete formed upon said rails, and anchored to the ground by Piles, Q a pneumatic buffer compe-Sed Of'a pneumatic cylinder and a plunger or ram locared within saidcylinder, ,an escape, cock or ya ve located at the rear of said cylinder, of a.

spring for protruding the end of the plunger matic cylinder' elng supported by st ee` rods embedded in' thefconcrete, re1nforced by turned-rail ends and crosse-.puces all beingenchered in the concreta Subtentially as specified.

` In testimony whereof I have signed 'myname to this specification in the presence of tWo subscribing n fitnessesc n THoMAs MCCORMIC. l

Witnesses:

Roer. R. KING, A, W. H. H. YOUNGJ 6o beyond the ed e of lthe cylinderLsaid :neuf ,A 

